/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.ibatis.ibator.generator.ibatis2.sqlmap.elements;

import org.apache.ibatis.ibator.api.FullyQualifiedTable;
import org.apache.ibatis.ibator.api.IntrospectedColumn;
import org.apache.ibatis.ibator.api.dom.java.FullyQualifiedJavaType;
import org.apache.ibatis.ibator.api.dom.xml.Attribute;
import org.apache.ibatis.ibator.api.dom.xml.TextElement;
import org.apache.ibatis.ibator.api.dom.xml.XmlElement;
import org.apache.ibatis.ibator.generator.ibatis2.XmlConstants;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class DeleteByPrimaryKeyElementGenerator extends AbstractXmlElementGenerator
{
    
    public DeleteByPrimaryKeyElementGenerator()
    {
        super();
    }
    
    @Override
    public void addElements(XmlElement parentElement)
    {
        XmlElement answer = new XmlElement("delete"); //$NON-NLS-1$
        FullyQualifiedTable table = introspectedTable.getFullyQualifiedTable();
        
        answer.addAttribute(new Attribute("id", XmlConstants.DELETE_BY_PRIMARY_KEY_STATEMENT_ID)); //$NON-NLS-1$
        FullyQualifiedJavaType parameterClass;
        if (introspectedTable.getRules().generatePrimaryKeyClass())
        {
            parameterClass = introspectedTable.getPrimaryKeyType();
        }
        else
        {
            parameterClass = introspectedTable.getBaseRecordType();
        }
        answer.addAttribute(new Attribute("parameterClass", //$NON-NLS-1$
            parameterClass.getFullyQualifiedName()));
        
        ibatorContext.getCommentGenerator().addComment(answer);
        
        StringBuilder sb = new StringBuilder();
        sb.append("delete from "); //$NON-NLS-1$
        sb.append(table.getFullyQualifiedTableNameAtRuntime());
        answer.addElement(new TextElement(sb.toString()));
        
        boolean and = false;
        for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns())
        {
            sb.setLength(0);
            if (and)
            {
                sb.append("  and "); //$NON-NLS-1$
            }
            else
            {
                sb.append("where "); //$NON-NLS-1$
                and = true;
            }
            
            sb.append(introspectedColumn.getEscapedColumnName());
            sb.append(" = "); //$NON-NLS-1$
            sb.append(introspectedColumn.getIbatisFormattedParameterClause());
            answer.addElement(new TextElement(sb.toString()));
        }
        
        if (ibatorContext.getPlugins().sqlMapDeleteByPrimaryKeyElementGenerated(answer, introspectedTable))
        {
            parentElement.addElement(answer);
        }
    }
}
